1 /* 2 * Copyright © 2014 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sub license, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the 13 * next paragraph) shall be included in all copies or substantial portions 14 * of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 22 * IN THE SOFTWARE. 23 */ 24 25 #include "i915_params.h" 26 #include "i915_drv.h" 27 28 #define i915_param_named(name, T, perm, desc) \ 29 module_param_named(name, i915_modparams.name, T, perm); \ 30 MODULE_PARM_DESC(name, desc) 31 #define i915_param_named_unsafe(name, T, perm, desc) \ 32 module_param_named_unsafe(name, i915_modparams.name, T, perm); \ 33 MODULE_PARM_DESC(name, desc) 34 35 struct i915_params i915_modparams __read_mostly = { 36 #define MEMBER(T, member, value) .member = (value), 37 I915_PARAMS_FOR_EACH(MEMBER) 38 #undef MEMBER 39 }; 40 41 i915_param_named(modeset, int, 0400, 42 "Use kernel modesetting [KMS] (0=disable, " 43 "1=on, -1=force vga console preference [default])"); 44 45 i915_param_named_unsafe(panel_ignore_lid, int, 0600, 46 "Override lid status (0=autodetect, 1=autodetect disabled [default], " 47 "-1=force lid closed, -2=force lid open)"); 48 49 i915_param_named_unsafe(semaphores, int, 0400, 50 "Use semaphores for inter-ring sync " 51 "(default: -1 (use per-chip defaults))"); 52 53 i915_param_named_unsafe(enable_rc6, int, 0400, 54 "Enable power-saving render C-state 6. " 55 "Different stages can be selected via bitmask values " 56 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " 57 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " 58 "default: -1 (use per-chip default)"); 59 60 i915_param_named_unsafe(enable_dc, int, 0400, 61 "Enable power-saving display C-states. " 62 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)"); 63 64 i915_param_named_unsafe(enable_fbc, int, 0600, 65 "Enable frame buffer compression for power savings " 66 "(default: -1 (use per-chip default))"); 67 68 i915_param_named_unsafe(lvds_channel_mode, int, 0400, 69 "Specify LVDS channel mode " 70 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 71 72 i915_param_named_unsafe(panel_use_ssc, int, 0600, 73 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 74 "(default: auto from VBT)"); 75 76 i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400, 77 "Override/Ignore selection of SDVO panel mode in the VBT " 78 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 79 80 i915_param_named_unsafe(reset, int, 0600, 81 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])"); 82 83 i915_param_named_unsafe(vbt_firmware, charp, 0400, 84 "Load VBT from specified file under /lib/firmware"); 85 86 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) 87 i915_param_named(error_capture, bool, 0600, 88 "Record the GPU state following a hang. " 89 "This information in /sys/class/drm/card<N>/error is vital for " 90 "triaging and debugging hangs."); 91 #endif 92 93 i915_param_named_unsafe(enable_hangcheck, bool, 0644, 94 "Periodically check GPU activity for detecting hangs. " 95 "WARNING: Disabling this can cause system wide hangs. " 96 "(default: true)"); 97 98 i915_param_named_unsafe(enable_ppgtt, int, 0400, 99 "Override PPGTT usage. " 100 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)"); 101 102 i915_param_named_unsafe(enable_execlists, int, 0400, 103 "Override execlists usage. " 104 "(-1=auto [default], 0=disabled, 1=enabled)"); 105 106 i915_param_named_unsafe(enable_psr, int, 0600, 107 "Enable PSR " 108 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) " 109 "Default: -1 (use per-chip default)"); 110 111 i915_param_named_unsafe(alpha_support, bool, 0400, 112 "Enable alpha quality driver support for latest hardware. " 113 "See also CONFIG_DRM_I915_ALPHA_SUPPORT."); 114 115 i915_param_named_unsafe(disable_power_well, int, 0400, 116 "Disable display power wells when possible " 117 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)"); 118 119 i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)"); 120 121 i915_param_named(fastboot, bool, 0600, 122 "Try to skip unnecessary mode sets at boot time (default: false)"); 123 124 i915_param_named_unsafe(prefault_disable, bool, 0600, 125 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 126 "For developers only."); 127 128 i915_param_named_unsafe(load_detect_test, bool, 0600, 129 "Force-enable the VGA load detect code for testing (default:false). " 130 "For developers only."); 131 132 i915_param_named_unsafe(force_reset_modeset_test, bool, 0600, 133 "Force a modeset during gpu reset for testing (default:false). " 134 "For developers only."); 135 136 i915_param_named_unsafe(invert_brightness, int, 0600, 137 "Invert backlight brightness " 138 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 139 "report PCI device ID, subsystem vendor and subsystem device ID " 140 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 141 "It will then be included in an upcoming module version."); 142 143 i915_param_named(disable_display, bool, 0400, 144 "Disable display (default: false)"); 145 146 i915_param_named_unsafe(enable_cmd_parser, bool, 0400, 147 "Enable command parsing (true=enabled [default], false=disabled)"); 148 149 i915_param_named(mmio_debug, int, 0600, 150 "Enable the MMIO debug code for the first N failures (default: off). " 151 "This may negatively affect performance."); 152 153 i915_param_named(verbose_state_checks, bool, 0600, 154 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); 155 156 i915_param_named_unsafe(nuclear_pageflip, bool, 0400, 157 "Force enable atomic functionality on platforms that don't have full support yet."); 158 159 /* WA to get away with the default setting in VBT for early platforms.Will be removed */ 160 i915_param_named_unsafe(edp_vswing, int, 0400, 161 "Ignore/Override vswing pre-emph table selection from VBT " 162 "(0=use value from vbt [default], 1=low power swing(200mV)," 163 "2=default swing(400mV))"); 164 165 i915_param_named_unsafe(enable_guc_loading, int, 0400, 166 "Enable GuC firmware loading " 167 "(-1=auto, 0=never [default], 1=if available, 2=required)"); 168 169 i915_param_named_unsafe(enable_guc_submission, int, 0400, 170 "Enable GuC submission " 171 "(-1=auto, 0=never [default], 1=if available, 2=required)"); 172 173 i915_param_named(guc_log_level, int, 0400, 174 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)"); 175 176 i915_param_named_unsafe(guc_firmware_path, charp, 0400, 177 "GuC firmware path to use instead of the default one"); 178 179 i915_param_named_unsafe(huc_firmware_path, charp, 0400, 180 "HuC firmware path to use instead of the default one"); 181 182 i915_param_named_unsafe(enable_dp_mst, bool, 0600, 183 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)"); 184 185 i915_param_named_unsafe(inject_load_failure, uint, 0400, 186 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)"); 187 188 i915_param_named(enable_dpcd_backlight, bool, 0600, 189 "Enable support for DPCD backlight control (default:false)"); 190 191 i915_param_named(enable_gvt, bool, 0400, 192 "Enable support for Intel GVT-g graphics virtualization host support(default:false)"); 193